supporters say they fear election fraud. opponents say it makes it harder for people like young adults and minorities to vote. allison? >>> and on the campaign trail today, tony, the two presidential candidates will leave it up to their running mates to do the talking. as they get ready for tomorrow's big debate. fox's doug luzader has the latest on the president barack obama and mitt romney debate preps. >> reporter: one new national poll is out. but it really hasn't done a whole lot to change the real clear politics, national average of polls, which shows the president nationwide about 3 1/2 points up, over mitt romney. but this all comes down to swing states, including colorado. the site of wednesday's debate. >> mitt romney is already in denver. getting in to the final campaigning and a last-minute endorsement from former broncos quarterback john elway but preparing for a much more critical stage on wednesday. >> so i look forward to these debates. i'm delighted that we will have three debates. it will be a conversation